grpc insecure cannot work ,grpc-server generate error: io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2Exception: Unexpected HTTP/1.x

[ljucas10]

Describe the bug grpc server and client use insecure InsecureChannelCredentials and gateway set ssl:use-insecure-trust-manager: true but does not work grpc-server generate error: io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2Exception: Unexpected HTTP/1.x request: POST /HelloService/hello

gateway config: spring: cloud: gateway: httpclient: ssl: use-insecure-trust-manager: true routes: - id: user-grpc uri: http://[::1]:8900 predicates: - Path=/**
- Header=Content-Type,application/grpc filters: - AddResponseHeader=X-Request-header, header-value